A scheduled guest and her family experienced a traffic accident several states away on the way to our place. Fortunately, they were not hurt, but the accident was serious enough to prevent them from using the vehicle for any further travel. Therefore, they had to cancel their reservation and were unable to stay with us. Since both the accident and the cancellation occurred within the 24-hour period during which they were scheduled to arrive, my understanding of AirBNB's policy is that they will not receive a refund. We are open to them receiving a partial refund. Is there a way that this can happen?